Function duckdb_file_handle_close 

pub unsafe extern "C" fn duckdb_file_handle_close(
    file_handle: duckdb_file_handle,
) -> duckdb_state

Closes the given file handle.

@param file_handle The file handle to close. @return DuckDBSuccess on success or DuckDBError on failure. If unsuccessful, the error data can be retrieved using duckdb_file_handle_error_data.